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一次性动脉灌注插管已广泛使用。以前对各种插管使用中两端的流体梯度尚未加以比较。本文有助于心胸外科医生判断成年人直视心脏手术时使用的插管功能。通过征询,120名医生例举了155种常用灌注插管。其中29种投入实验。82%的被征询者使用这些插管的型号分别为21 F、22 F和24 F。插管以导管连接于一半径为127 mm的滚压型血泵。线路中不连接氧合器、贮血器及滤血器。五个血泵分别校准流率为1～5 L/分。每种插管分别在五种流率下接受实验。平均管内压以传感器及监测仪记录。插管两端的压力梯度定义为管内压与管端压的差。本实验中由于管端开放压力为零,管内压即为压力梯度。插管功能指数是指流率为5 L/分时,插管的压力
One-time arterial infusion cannula has been widely used. The fluid gradients at both ends of various intubation uses have not previously been compared. This article helps cardiothoracic surgeons to determine the intubation function used by adults in cardiac surgery. Through consultation, 120 doctors cited 155 commonly used perfusion cannulas. 29 of them are put into experiment. 82% of consultants used these cannulas as 21 F, 22 F and 24 F, respectively. The cannula is catheterically connected to a rolling blood pump with a radius of 127 mm. The circuit does not connect the oxygenator, blood reservoir and hemofilter. Five blood pumps were calibrated flow rate of 1 ~ 5 L / min. Each tube was tested at five flow rates. The average tube pressure sensor and monitor records. The pressure gradient across the tube is defined as the difference between tube pressure and tube end pressure. In this experiment, the pressure inside the tube is the pressure gradient due to the open pressure at the tube end is zero. Intubation function index refers to the flow rate of 5 L / min, intubation pressure